import Vue from 'vue'
import Router from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'

Vue.use(Router)

const router = new Router({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home',
      component: Home,
      redirect: '/Welcome',
      children: [{ path: '/Welcome', component: Welcome },
        { path: '/users', component: Users }]
    }
  ]
})

router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 表示从哪个路径跳转来
  // next 表示接下来要访问的路径
  // next()代表放行
  // next('/强制跳转')

  if (to.path === '/login') return next()
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
